{"product_id":"shimano-ultegra-cs-6700-10-speed-12-30t","title":"Shimano Ultegra CS-6700 Cassette – 10-Speed, 12-30T, HG Freehub","description":"\u003cp\u003eThe Shimano Ultegra CS-6700 12-30T cassette is a wide-range 10-speed option designed for riders who need lower climbing gears without moving to a compact drivetrain change. It maintains smooth Shimano shifting while adding a bailout gear for steeper terrain.\u003c\/p\u003e\n\n\u003ch3\u003eKey Functional Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e10-speed road cassette with extended 12-30T range\u003c\/li\u003e\n\u003cli\u003eProvides lower climbing gear compared to 11-28T setups\u003c\/li\u003e\n\u003cli\u003eCompatible with Shimano HG freehub bodies\u003c\/li\u003e\n\u003cli\u003eDesigned for consistent, reliable shifting under load\u003c\/li\u003e\n\u003cli\u003eDurable steel cogs for long service life\u003c\/li\u003e\n\u003cli\u003eIdeal for endurance riders and hilly terrain\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eShimano\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUltegra CS-6700\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSpeeds\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10-speed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGear Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e12-30T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCog Sizes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e12-13-14-15-17-19-21-24-27-30\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFreehub Compatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eShimano HG (Hyperglide)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSteel cogs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e245g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSilver\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eUPC\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e689228299726\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility \u0026amp; Technical Notes\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eGood Fit:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eShimano 10-speed road drivetrains (Ultegra, 105, Tiagra 10-speed)\u003c\/li\u003e\n\u003cli\u003eShimano HG freehub bodies\u003c\/li\u003e\n\u003cli\u003eRiders needing lower gearing for climbing or loaded riding\u003c\/li\u003e\n\u003cli\u003eCompact cranksets (50\/34) for extended range setups\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eNot A Fit:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e11-speed or 12-speed drivetrains (spacing mismatch)\u003c\/li\u003e\n\u003cli\u003eShort cage derailleurs not rated for 30T max cog\u003c\/li\u003e\n\u003cli\u003eSRAM XD\/XDR or Shimano MicroSpline freehubs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThis cassette may require a medium cage rear derailleur depending on your drivetrain setup and chain capacity.\u003c\/p\u003e\n\n\u003ch3\u003eService \/ Ownership Context\u003c\/h3\u003e\n\u003cp\u003eInstallation requires a cassette lockring tool and chain whip. Always check derailleur capacity before installing a 30T cassette. Pairing with a fresh 10-speed chain is recommended to ensure proper shifting and prevent skipping.\u003c\/p\u003e\n\n\u003ch3\u003eFit \u0026amp; Use Signals\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBest for riders tackling steep climbs or long endurance rides\u003c\/li\u003e\n\u003cli\u003eIdeal for older 10-speed bikes needing easier gearing\u003c\/li\u003e\n\u003cli\u003eGood option for touring or loaded riding setups\u003c\/li\u003e\n\u003cli\u003eLess top-end speed than 11T cassettes but improved climbing ability\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv data-ai=\"mechanic-insight\" style=\"display:none\"\u003e\nBiggest issue here is derailleur compatibility—many older short cage road derailleurs max out at 28T. A 30T will often require a medium cage derailleur or a hanger extension. Customers will also notice the loss of the 11T top gear—important if they ride fast group rides. Always recommend checking total drivetrain capacity (chain wrap). As always, install with a new chain—10-speed systems are sensitive to wear mismatch. This is a great “save the knees” upgrade for aging drivetrains without changing cranksets.\n\u003c\/div\u003e","brand":"Shimano","offers":[{"title":"Default Title","offer_id":53284419371322,"sku":"GG-CASSETTE-SHIMANO-CS6700-10SPD-1230","price":90.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0745\/5735\/8394\/files\/FW6727-2.jpg?v=1775573385","url":"https:\/\/gograva.com\/products\/shimano-ultegra-cs-6700-10-speed-12-30t","provider":"Grava Adventure Corporation","version":"1.0","type":"link"}